QA401 measurement question

Discussion in 'Test & Measurement Forum' started by coinmaster, Feb 8, 2018.

  1. coinmaster

    Thread Starter Member

    Dec 24, 2015
    492
    8
    I just received a QA401 and I have a question about the result of the measurement I'm getting
    [​IMG]
    I don't understand why the fundamental frequency is so far below 0db, this is giving me a false distortion reading as well.
     
  2. AlbertHall

    AAC Fanatic!

    Jun 4, 2014
    7,080
    1,696
    What is the input voltage?
    What is the input attenuator set to?
     
  3. ebeowulf17

    Distinguished Member

    Aug 12, 2014
    2,647
    521
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